Pearl are only obtained by this event so once the dead lines over you cant get them till NEXT Summer.

Mission 1: 25 + Credit + whatever reward this year
Mission 2: 50 Pearls + Credit + whatever reward this year
Mission 3: 75 Pearls + Credit + whatever reward this year
Mission 4: 100 Pearls + Credit + whatever reward this year

Mission 1: 10 Pearls
Mission 2: 20 Pearls
Mission 3: 30 Pearls
Mission 4: 30 Pearls + 2 per personal kill + 1 per assisted kill

If you have nothing from Beach Toy here is the amount of Pearls you need (not including mods and wraith & including)
11,246 or 13,016
Lets say you kill about 20-37 solo kills in one mission + the 30 when completed it would be 70-104 Pearls per Mission.
it would take roughly 75-150 times you have to play to get all pearls you need

Despite Warframe abilities and passives being disabled, certain mods and weapon passives are not

• Fast Frames to use(higher then 1.09): Gauss(1.5),Loki(1.25),Wisp(1.25),Ash(1.2),Barkuu(1.2),Ivara(1.2),Mirage(1.2),Nezha(1.2),Nova(1.2),Protea(1.2),Banshee(1.15),Dante(1.15),Equinox(1.15),Gara(1.15),Lavos(1.15),Limbo(1.15),Zephyr(1.15),Nyx(1.12),Caliban(1.1)Dagath(1.1),Ember(1.1),Kullervo(1.1),Mesa(1.1),Nekros(1.1),Revenant(1.1),Trinity(1.1),Valkyr(1.1)
  
• Amalgam Barrel Diffusion and Amalgam Serration grant dodge speed and sprint speed, respectively.
  
• Praedos grants parkour velocity if Evolved Ascension has been selected.
  
• Since all parkour maneuvers are allowed, the player can perform Jump Kicks in order to inflict Knockdown on the Executioners, making them significantly easier to shoot.(This deals 0 damage)
  
• The True Master's Font Damage Blessing increases Soaktron/Lob Blob damage.
  
• Direct hits from Lob Blobs can instantly kill the Executioners.
  
• Enemies that beeline toward the player from afar will move in a straight line, making them very easy to hit despite the Soaktron's slow projectile speed.

Q: Wait I can do something with the Pearls?
A: Yes, if you got to Cetus and go to Nakak she has open a shop for the even called Beach Toy.

Q: Is it better to play solo?
A: If you want only solo kills sure but it might take longer if you die a lot.

Q: It's the end of the event and I can't find Beach Toy with Nakak
A: It closes when the event is over and its back to her Browse Wares

None of these are what your asking for? Text it in the comments and ill do my best to answer.

This will get updated every Summer Event to give detail if new rewards they added rewards and the math (assume you have everything from this past ones) tell you how much Pearls you need to help you out

Some stuff is from the Warframe Fandom, the math was on there but i didn't know till i was fixing up everything and adding things i missed or that could be helpful.


Rating and rewards would be highly appreciated! Hope you have a Good Life and stay Safe<3